Nigel W. O. Hutchison Ute Neuhaus Manfred Schmidt-Schauß Cordelia V. Hall Natural Expert: A Commercial Functional Programming Environment. 163-182 1997 7 J. Funct. Program. 2 db/journals/jfp/jfp7.html#HutchisonNSH97 http://journals.cambridge.org/action/displayAbstract?aid=44075